For instance, structural materials for liquid rocket engines not only endure high-temperature impacts but must also withstand ultra-low temperature environments (below -100°C) due to the presence of cryogenic storage propellants like liquid hydrogen (boiling point -253°C) and liquid oxygen (boiling point -183°C). Therefore, ideal structural materials for liquid rocket engines require excellent cryogenic mechanical properties. Similarly, medical devices used for cryosurgery utilize liquid nitrogen for instantaneous cryogenic freezing of localized patient tissue, allowing for rapid and painless procedures after tissue solidification.

The GoGo Instruments In-situ Tensile Testing Machine Heating/Cooling Stage serves as a cryogenic testing platform compatible with most tensile testing machines. It enables mechanical property testing of materials at various environmental temperatures through precise temperature control, accurately assessing material performance under different deformation temperatures. This provides crucial data support for material service in complex thermal environments.

Cooling Process of the In-situ Tensile Testing Machine Heating/Cooling Stage

Cryogenic Uniaxial Tensile Test

For metallic materials, their service temperature significantly impacts their mechanical properties. Some metals exhibit a substantial increase in fracture strength and elongation at ultra-low temperatures (e.g., 77K). Furthermore, unlike high-temperature forming processes which can cause material oxidation, cryogenic forming processes do not suffer from this issue, offering a new pathway for enhancing the formability of metal shaping techniques.

◆ Material Hardening and Embrittlement
◆ Alteration of Material Plastic Deformation Capability
◆ More Uniform Evolution of Material Strain Distribution
◆ Changes in Material Plastic Deformation Mechanisms

Cryogenic uniaxial tensile testing examines the influence of temperature on the mechanical properties and deformation mechanisms of specimens under a uniaxial stress state.

Temperature Control Process During Cooling

Uniaxial Tensile Stress-Strain Curves at 295 K and 77 K

Research Content and Key Points:

◆ The temperature control algorithm of the in-situ tensile testing machine heating/cooling stage can accurately maintain the required deformation temperature.
◆ The in-situ tensile testing machine heating/cooling stage is compatible with most universal testing machines for conducting cryogenic tensile tests, enabling accurate measurement of material mechanical properties at low temperatures.
◆ The oxygen reflux defogging technology and viewing window of the in-situ tensile testing machine heating/cooling stage allow for real-time monitoring of deformation during cryogenic processes when combined with DIC testing technology.
◆ By configuring the tensile testing machine parameters, uniaxial tensile tests under varying temperatures can be perf

Tests indicate:

The in-situ tensile testing machine heating/cooling stage developed by GoGo Instruments Technology is compatible with various universal testing machines. During testing, its integrated temperature control program enables real-time temperature management, facilitating uniaxial tensile tests to evaluate mechanical properties at different deformation temperatures. Furthermore, by setting appropriate experimental parameters for the tensile process, the mechanical performance of specimens under complex variable temperature conditions can be characterized, guiding material application in environments with intricate thermal variations.